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The following commit(s) were added to refs/heads/master by this push:
new 2fb5f6aa9 MATH-1658: Enable passing a "ConvergenceChecker" as
"OptimizationData".
2fb5f6aa9 is described below
commit 2fb5f6aa950cae4cca7997bfd3990e35eda4cef2
Author: Gilles Sadowski <gillese...@gmail.com>
AuthorDate: Thu Jun 29 23:49:51 2023 +0200
MATH-1658: Enable passing a "ConvergenceChecker" as "OptimizationData".
---
.../commons/math4/legacy/optim/BaseOptimizer.java | 8 ++-
.../math4/legacy/optim/ConvergenceChecker.java | 2 +-
.../math4/legacy/optim/BaseOptimizerTest.java | 77 ++++++++++++++++++++++
src/changes/changes.xml | 3 +
4 files changed, 88 insertions(+), 2 deletions(-)
diff --git
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/BaseOptimizer.java
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/BaseOptimizer.java
index 4ebd6fb18..3e16d7b28 100644
---
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/BaseOptimizer.java
+++
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/BaseOptimizer.java
@@ -39,7 +39,7 @@ public abstract class BaseOptimizer<PAIR> {
private static final MaxIterCallback MAX_ITER_CALLBACK = new
MaxIterCallback();
/** Convergence checker. */
- private final ConvergenceChecker<PAIR> checker;
+ private ConvergenceChecker<PAIR> checker;
/** Maximum number of evaluations. */
private int maxEvaluations;
/** Maximum number of iterations. */
@@ -141,6 +141,7 @@ public abstract class BaseOptimizer<PAIR> {
* <ul>
* <li>{@link MaxEval}</li>
* <li>{@link MaxIter}</li>
+ * <li>{@link ConvergenceChecker}</li>
* </ul>
* @return a point/value pair that satisfies the convergence criteria.
* @throws TooManyEvaluationsException if the maximal number of
@@ -210,6 +211,7 @@ public abstract class BaseOptimizer<PAIR> {
* <ul>
* <li>{@link MaxEval}</li>
* <li>{@link MaxIter}</li>
+ * <li>{@link ConvergenceChecker}</li>
* </ul>
*/
protected void parseOptimizationData(OptimizationData... optData) {
@@ -224,6 +226,10 @@ public abstract class BaseOptimizer<PAIR> {
maxIterations = ((MaxIter) data).getMaxIter();
continue;
}
+ if (data instanceof ConvergenceChecker) {
+ checker = (ConvergenceChecker<PAIR>) data;
+ continue;
+ }
}
}
diff --git
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/ConvergenceChecker.java
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/ConvergenceChecker.java
index 63f7cca2a..221af27fc 100644
---
a/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/ConvergenceChecker.java
+++
b/commons-math-legacy/src/main/java/org/apache/commons/math4/legacy/optim/ConvergenceChecker.java
@@ -42,7 +42,7 @@ package org.apache.commons.math4.legacy.optim;
*
* @since 3.0
*/
-public interface ConvergenceChecker<PAIR> {
+public interface ConvergenceChecker<PAIR> extends OptimizationData {
/**
* Check if the optimization algorithm has converged.
*
diff --git
a/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/BaseOptimizerTest.java
b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/BaseOptimizerTest.java
new file mode 100644
index 000000000..69d4ac812
--- /dev/null
+++
b/commons-math-legacy/src/test/java/org/apache/commons/math4/legacy/optim/BaseOptimizerTest.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.commons.math4.legacy.optim;
+
+import org.junit.Test;
+import org.junit.Assert;
+
+/**
+ * Tests for {@link BaseOptimizer}.
+ */
+public class BaseOptimizerTest {
+ @Test
+ public void testDefault() {
+ final DummyOptimizer dummy = new DummyOptimizer(null);
+
+ final Object result = dummy.optimize();
+
+ // No default checker.
+ Assert.assertEquals(null, dummy.getConvergenceChecker());
+ // Default "MaxIter".
+ Assert.assertEquals(Integer.MAX_VALUE, dummy.getMaxIterations());
+ // Default "MaxEval".
+ Assert.assertEquals(0, dummy.getMaxEvaluations());
+ }
+
+ @Test
+ public void testParseOptimizationData() {
+ final DummyOptimizer dummy = new DummyOptimizer(null);
+
+ final ConvergenceChecker<Object> checker = new
ConvergenceChecker<Object>() {
+ @Override
+ public boolean converged(int iteration,
+ Object previous,
+ Object current) {
+ return true;
+ }
+ };
+
+ final int maxEval = 123;
+ final int maxIter = 4;
+ final Object result = dummy.optimize(checker,
+ new MaxEval(maxEval),
+ new MaxIter(maxIter));
+
+ Assert.assertEquals(checker, dummy.getConvergenceChecker());
+ Assert.assertEquals(maxIter, dummy.getMaxIterations());
+ Assert.assertEquals(maxEval, dummy.getMaxEvaluations());
+ }
+}
+
+class DummyOptimizer extends BaseOptimizer<Object> {
+ /**
+ * @param checker Checker.
+ */
+ DummyOptimizer(ConvergenceChecker<Object> checker) {
+ super(checker);
+ }
+
+ @Override
+ protected Object doOptimize() {
+ return new Object();
+ }
+}
diff --git a/src/changes/changes.xml b/src/changes/changes.xml
index 4242b6c40..7cdfff9d3 100644
--- a/src/changes/changes.xml
+++ b/src/changes/changes.xml
@@ -96,6 +96,9 @@ Caveat:
to support the whole codebase (it was one of the main reasons for
creating more focused components).
">
+ <action dev="erans" type="update" issue="MATH-1658">
+ Allow convergence checker to be specified as "OptimizationData".
+ </action>
<action dev="erans" type="update" issue="MATH-1657" due-to="François
Laferrière">
Small refactoring of the "evaluation counter" in optimizers' base
class:
Provide (protected) accessor (to replace method
"computeObjectiveValue").
